Machine for the filing and setting of saws



Dec. 13, 1927. F 1,652,454

R. T. MYERS MACHINE FOR THE FILING AND SETTING OF SAWS Filed Aug. 18, 1924 3 Sheets-Sheet 1 //1 1/8/7 for 1,652,454 R. T. MYERS MACHINE FOR THE FILING AND SETTING 0F SAWS Dec; 13, 1927.

Filed Au 18, 1924 3 Sheets-Sheet 3 Patented Dec. 13, 1927.

UNITED 'V'STATES" RICHARDTHOMASMYERS, or oonvnrrrs, onseon.

MACHINE FOR THE' FILING. AND SETTING F SAWS.

Application filed Au ust s, .1924. Serial No. 732,806.

7 My invention is intended for use in shops andfactories and in fihng rooms where saws in quantity are being filed, and consists of number of teeth to the inch and ofv any de- Further gree of slope to the cutting'edge. new. anclnovel features of my invention are made in the arrestedfeedmechanism where the number of filing strokes is governed by the depth to whiclithe file is topenetrate into the saw body, the same being governed by the amount of metalto be cut away.-

Additional usefulness resides in the filing and setting mechanism being operated by, the same feeding. and operating mechanisms.

My invention is adapted to being poweroperated and to lift the filegcle'ar of. the.

saw body during the return-stroke and, to feedthe saw and clamp to theneXt space alsoonthe return stroke of the file... Graduated means is provided to. determine, the angle at which the file is inclined. to. the vertical and also the angle to whichthefile is being operated: in relation tothe opera-- tion across the saw. f

I. attain these objects bythe mechanism illustrated in the accompanying. drawings,

in which I r Fig. l is a section viewof the-machine. Fig. 2 is a plan view of the same- Fig.. 3 is a sectional view taken on line 33 of 1 looking in the direction indicated.

the clamping mechanism. I V

Fig. 5 -is a plan view of the mechanism shownin the previous figure.

Fig. 6 is a fragmentary view. showing the set mechanism. V

Fig. 7 is a partial end, partial. sectional view of-the feeding mechanism.

Fig; 8 is a sectional fragmentary View of the mechanism shown in Fig. 7. taken on line 8v8 of Fig. 7. looking in the direction indicated.

Fig. 9 and Fig. '10 are diagrammatical plan views ofthe feeding mechanism in different positions. v

Fig. 11.is aplan view of the feeding cam.

.Fig. 12;is afragmentary plan View oftheable bearings.

Fig. 4 is afragmentary sideelevation of clamping mechanism at the location of the saw handle. 7

Like reference characters refer to like parts throughout the different views.

1. is the base of the machine made of cast iron or other suitable rigid material supporting a frame member 2 to which the feeding and filing members are attached in suit- Projecting from the frame and supported upon the base is the tablesupport 3. A columnet is provided for supporting the clamping membersfi and 6 that are used for maintaining the saw tobe: filed in fixed position. The saw is shown at-7. The 00111111114 is supported upon a suitable table base 9 having a journal 8 passing therethrough to act as a bearing and support for the gear 13. The lower.- part of the column the housing 10 that serves. to journal the same for proper alinement and atthe same, time is held in placed position by the clamping of the screw 11 tending to restrict the base is made cylindrical to operate'within at an angle to the file which is ;made to operate in a fiXe'dpath in so far as, the relation to-' the oscillation of the feed'is cone cerned. l j

The clamp side 5 operates within 'a suitable slide bearingupon the column l; as shown at 14 andjhas attached to it the rack 15 and -is held in fixed relationship therewith. by suitable means which is shown as a screw 15 Meshing with the rack and being driven thereby is a pinion 16 upon the shaft 17 that is being driven by thepinionlS attached to the lower end of the shaft 17. The shaft 17 is journaled within suitable bearings within the column to insure precise alineme'nt. 'The gears 13 and 18 coaot with each other, with the gear 13 being the driving member. V

Toprovide the feeding. of the clamping means a fixed amount each timeto co'rrespond to the pitch of the saw andthe saw itself, requires special means for that purpose which I-will'now describe.

g I'n the fil-ingof a saw it is desirable to-cut away sullicient metal only on, the cutting edge of the saw tooth to sharpen the cut ting edge, and to cut as little as possible from the back otl' the saw tooth. This condition may be changed somewhat if the rake ot the tooth is to be changed, but on most filings excepting the first filing this will be true, and on the first filing this will always be true. Because of the desirability of making the main filing cut from the face, or cutting edge of the tooth, the filing pressure is in the direction of inclination of the face of the saw tooth, and because of this fact, the filing operation is not completed upon the individual tooth until a certain depth is reached. I have provided a depth stop that governs the filing depth, as well as automatic means to govern the spacing upon the release of the filing pressure. The absence of filing pressure is indicative of the completion of the filing of the individual tooth irrespective ot the depth, and this is primarily true when a used saw is being filed.

To insure the full cutting capacity of the file during each stroke of the filing operation, I have provided a means for the application of additional filing pressure as the filing stroke progresses. As soon as the file has completed its cut on the forward or cutting stroke the saw will then be ready to be spaced one tooth space to begin a new filing cycle. It will thus be seen that I have provided two means for the governing of the completion of the cycle of filing, first by the depth to which the file penetrates the saw blade, the other by the absence of resistance to the application of filing pressure, but the full depth may not be attained so long as filing pressure is required, excepting when the rake is being changed, then the depth may have been attained and yet the tiling may not have been completed and it is for this reason among others, that the automatic feature becomes necessary.

To insure the cutting file moving in a true path a suitable guide 19 is provided through which the slide 20 operates, a suitable back 91 is provided to afi'ord strength and rigidity, having on its forward end a suitable holder to support the file as shown at 22, the file is shown at Because of the act that the rake oi the saw tooth varies for different uses it is necessary to change the angle of the file,and to provide means :lor knowing in advance the angle at which the cutting edges of the file are inclined I have provided a graduated head in order that the operator of the machine may set the file to the desired angle. A link connects the reciprocating motion to be provided which in turn is connected to the arm 26 through suitable pin bearing connections. The arm 26 is journaled about a pin at its lower end at 26 and has a pin midway its ends as shown at 28 to which the arm 27 is connected, and the arm 27 is connected by screw adjustment means to the eccentric strap 29. Rotary movement of the disk 30 imparts reciprocating motion to the connections of the eccentric strap, and in turn to the file and the file l'raine.

To give best results to the filing of the saw it is found desirable to lift the file cl air of the saw during each return stroke of the file and frame. This is accomplished by pivoting the arm .32 about the pin 31 that is made secure within the frame member 2. The guide 19 is made fast to the arm 32. At the rear end oi the arm 32 a pin 33 is provided for oliicrating within the slot 35 of the eccentric rod 34; which secured to the eccentric strap 36. The eccentric disk 36' is secured to the shaft 37, and the object of the slot 235 is to prevcntthe raising of the arm during the forward movement of the file, but to raise the same dur: ing the return stroke of the same.

The depth gage is one of the important features of my invention, for it peritorn'ls the in'iportant function of determining the depth of the tooth, thev distance the file may penetrate the saw body, as well as to com pensate for the camber that is provided in some saws. The depth gage 38 contacts with the removable sloping member 39. Ii": the plane of the teeth lies in a straight line,

the member 39 will be a straight line, but.

it they form a curvature or lie in a camher the member 39 will be selected to come spend to the camber of the teeth.

Adjustable screw means 40 is provided at the top oi the gage, 'lor deterntiining the depth and the same may be set to meet the requirements oil' each saw beingfiled.

It will require a difi'crent weight to be applied upon the file for a tooth of small pitch to one oi a larger pitch. To provide for this I have graduated the back of the file frame 21 as shown at ll and have pro vided a weight rider +12, to add the additional weight required, the same to be po' sitioned to supply the weight to meet the requirement of the saw being filed.

'lo supply the filing :irc:1sure, I. have provided a cam member =4"; placed about shalt 3'7 and naming one complete revolution :tor each revolution of the shalt, the object being to slightly crowd the saw against the file during the forward or cutting strohe of the file. shown in Fig. 11. From this view it will be seen that for a part of the circumitercnee of the cam a slight increase in diameter occurs, and for the remainder of the circum- 'lercncc or periphery a decrease in dian'ieter occurs. The decrease in diameter is to provide for an absence of crowding pressure duringthe retiu'nstroke ot the file, and the increase in diameter is to provide an in- An cnlarged'vicw of this cam is guide 49with' the-lever {l6andto impart a,

reciprocating -movement to the guide 49. Connecting rod 50 has attached thereto a thnmbadgusting screw 52 agalnst which the compression spring 51' rests upon its onev end and" the spring rests against the guide 49 on the other, the rod' sliding in a work ing fit through the guide block, the pressure that is applied to this spring supplies the crowding or filing pressure that is applied tothe file during the forward stroke of the file andwhen a limited or no pressure is created in this spring, the absence of filing pressure is created, indicating that the tooth has been completed and the filing cycle of operation has been completed. The connecting rod'is secured at its opposite end to the bell-crank 54; by'means of pin 53am imiarts a reci arocatin movement to thebell crank arm. The bell-crank is secured in position by shaft 55 and the opposite arm 56 carries a pin'57 about which pawl 58 is pivoted. Stop pin 59' is also secured to the bell-crank arm 56, and spring 60, which is secured tot-he pawl, tends to holdthe pawl in position. The bell-crank arm 56 terminatcs on'its outer end with a wing-shaped member 61 having a depression 62, into whichpawl or stop 68 engages "when the.

arm reaches a position permitting engagement of the same therein. mounted-upon the pawl arm 64; by means of the bit 63 andis pivoted about the pin6t and the stop pin 67: serves to stop the move ment'of the arm and at the same time to form a post for securing one end of the spring 66 thereto to form a flexible contact for the pawl. The arm 6% is held in position against the stop by the action of the spring 65.

Mounted upon the shaft 55 are a series of ratchet disks that are attached-to the shaft and when rotated impart a rotary movement to the shaft. These ratchet disks are so made to correspond to the pitch of the saw teeth, and it will be noted that in filing,

saws alternate teeth are filed because of the set in the teeth, and therefore each notch on the disk corresponds to the space of two teeth upon the saw. that the pitch of the teeth is different for different uses of the saw, I have provided a sufhcient number of these disks to enable the operatorto condition the widest range met with in practice. I have'here'shown the sawof a coarse pitch to have a 'corre: sponding disk located at the top of the bank oi disks and the corresponding next lower The pawl 63 is 9 Because of the fact disk located below the same, but I do not wish tobe limited to the location ot'these disks, for the reverse order-may be made to work equally well. The shaft 55 has heretofore been described as carrying the driving gear meshing withthe driven gear 18 which acts to feed the saw, and the saw clamp, upon the completion of the filing ofthe tooth. One notch of the ratchet disk feeds the saw and saw clamp one cycle of operation corresponding to the pitch-oi the saw as required for alternate teeth, The pawl 58'is carried upon pin 57 and is held underpressure by spring which is se cared to the pawl. The spring 60 engages with stop pin 59, and since the pawl isshii ted vertically about the pin 57 topermit its engagement with the various ratchet disks,

the spring 60 is made to engage innotches 59 in the pin 59 that holds the pawl in locked position for engagement with the desired'ratchet disk. Separating disks 70 are placed between the ratchet disks to permit the engagement of the feeding pawl 58,

and it'will be apparent that the movement o theratchet disk will be governed by the engagement of the pawl with the disk and themove'ment of the bell-crank. Since the movement of the bell-crank is a constant, with thee'xcept-ion of theccoinpression that may be absorbed by the springi5l it becomes necessary to prevent the engagement of the pawl with the ratchet wheel. I have therefore provided the disk 70 having a series of locating holes 71 into which fits the stop pin 72, and the disk may then be positioned" to the stop corresponding to the pitch upon the saw. to be filed. When this has been accomplishedthe shield surface 73 of the disk 70 will be interposed between the pawland the ratchet disk and the pawl will ride upon the shoulder 7a and out of engagement with the ratchet disk for a part of the stroke on the finer pitched saws, and the distance thatthe same rides the .i'ace 73 will depend upon the pitch of the saw, and therefore the location of the disk as determined by the hole into'whichthe pin 72' is made to engage. I'Vher'e the filing pressure, in any stroke, is too great to prevent the pawl to travel the space of one notch upon the ratchet pawl upon which it is set, the compression.spring 51 is brought into action and a suiiicient filing stroke operation will be brought into play until this has been relieved; at which time the arrested feed will permit a-cycle of operation to be completed and the, pawl will'pass into the the, 'saw' and clampor makethe shifting of the same possible, andgthis is. accomplished by the loosening of the locking bolt 8 which 7 causes a frictionconnection between the com- &

pression collar and the gear 13 being forced in tight relationship with the collar 77 uponthe shaft 5:").

In the setting of the saw the ratchet disk is used .:orresponding to the alternate tooth pitch of the saw, and the plunger 78 having the degree of set required asshown at 79 is brought into contact with the saw tooth to place the desired amount of set into the saw tooth. This is best shown in Fig. 6, and the degree of set may be arranged in advance by the locking screw 80 being applied against the slope 81 ot' the plunger 78.

The tile held and locked as shown in Fig. iwherein the locking screw 80 is brought into locking contact with the iile 23. The angle at which the lilo may be turned from the vertical is determined by the same being held in the rotatable locking head 82, the head being held in locked position by the screw 8st.

Having thus described my invention I wish to make the following claims therefor- 1. A machine for the tiling and setting of saws, comprising parallel saw-holding members, a reci rocable tile-holding member, and automatic means for spacing a saw positioned in said saw-holding members past the tile-holding member on the completion of tiling a saw tooth, said means comprising a cam, a lever oscillated by said cam, a bellcrank having a pawl mounted on one arm thereof, a connecting rod disposed between the other arm or said bell-crank and said oscillated lever, a series of ratchet disks mounted on a vertical shaft and adapted to be selectively rotated by said bell-crank and pawl, a vertical shaft and series oi gears connecting said disks with the saw-holding members and adapted to cause the same to move past the tile-holding member when said ratchet disks are rotated.

2. A machine for the tiling and setting of saws, comprising parallel saw-holding memhers. a, reciprocable tile-holding member. automatic means for spacing a saw positioned in said saw-holding members past the Lille-holding member, said means comprising a cam, a lever oscillated by said cam, a bellcrank having a pawl mounted on one arm thereof, a. connecting rod disposed between the other arm of said bell-crank and said oscillated lover, a series of ratchet disks mounted on a vertical shaft and adapted to be selectively rotated by said bell-crank and pawl, a vertical shaft and a. series of gears connecting the ratchet disks with the sawholding members and adapted to cause the same to move past the file-holding member when said ratchet disks are rotated, and means to predetermine the amount of moveme-nt of said saw-holding members, said. means comprising separating disks placed between said ratchet disks and having shoulders thereon to be interposed between said pawl and the notches otsaid ratchet disks.

a stationary guide for said slide, a back melnber, a tile-holder support, and clamping heads adapted to having a tile positioned therein; a means adapted to reciprocate said tile-holding member, con'iprising a link disposed between said reciprocable file-holding member and a pivotally mounted oscillated arm, an eccentric disk, an eccentric strap placed about said eccentric disk, and an arm disposed between said eccentric disk and said oscillating arm; and automatic means for spacing the saw-holding members past the tile on the completion of tiling a tooth.

l. A machine for the tiling and setting of saws, comprising parallel members adapted to hold a saw positioned therebetween, a reeiprocable tile-holding member disposed thercabove, a means adapted to reciprocate said tile-holding member comprising a link disposed between said reciprocable file-holding member and a pivotally mounted oscillating arm, an eccentric disk, an eccentric strap placed about said eccentric disk. and an arm disposed between said eccentric disk and said oscillating arm; and automatic means for spacing the sawholding members past the tile holding member.

5. A machine for the tiling and setting of saws, con'iprising parallel members adapted to hold a saw positioned therebetween, a reciprocable file-holding member disposed thereabovc, comprising a reciprocable Slide, a stationary guide for said slide, a back member, a tile-holder support, clan'iping heads adapted to having a file positioned therein; a means adapted to reciprocate said file-holding member comprising a link disposed between said rcci1n'ocable tile holding member and a pivotally mounted oscillatable arm, an eccentric disk, an eccentric strap placed about said eccentric disk. and an arm disposed between said eccentric disk and said oscillating arm; a means to raise the tile clear of the saw at the completion of the tiling stroke preparatm'y to the return stroke, said means comprising an arm pivoted centrally to a stationary support, and having one end thereof pivotally connected to the before-1nentioned stationary guide, an eccentric rod having one end thereof connected to an eccentric strap disposed about an eccentric disk and having a slot formed in its opposite end to slidably and pivotally connect said eccentric rod to said arm; and automatic means for spacing the saw posilllil Ill) tioned in the saw-holding members past the file on the completion of the filing of a tooth.

(3. In a machine for the filing and setting of saws, comprising parallel members adapted to hold a saw therebetween, a reciprocable file-holding member disposed above said parallel members and adapted to having a reciprocating movement imparted thereto, means to position a file therein; a means to elevate said file at one state of the reciprocating movement thereof, said means. comprising an arm pivoted centrally to a sta' tionary support, and having one end thereof pivotally connected to the before-mentloned file-holding member, an eccentric rod having one end thereof connected to an eccentric.

7. In a machine for the filing and setting of saws, consisting of parallel members adapted to hold a saw positioned, a column support for said parallel members, a table base support ior said column, said column adapted to partial revolution about the vertical center axis of said table base support; a reciprocable file-holding member disposed above said first-mentioned parallel members;

a means adapted to reciprocate said fileholding member consisting of a link disposed between said reciprocable file-holding member and a pivotally mounted oscillating arm, an eccentric disk, an eccentric strap placed about said eccentric disk, and an arm disposed between said eccentric disk and said oscillating arm; and automatic means for spacing the saw-holding members past the file holding member.

RICHARD THOMAS MYERS. 

